Are they compatible ? I'm looking to buy a busted Shimano 600 RD w/ a missing outer plate and I have and old 7400 outer plate not being used in my box... more precisely both models are RD-6401 (non aero) and RD-7400....

Thanks in advance,,, ;)

03-10-13, 06:39 PM

IthaDan

I have like 3 6401 RDs, be happy to measure c-t-c on the pulley bolts. With that you should have a pretty good sense of it.

Just give me the sign.

03-10-13, 07:00 PM

bloom87

7400 pretty short @ 47mm (hole to hole, center to center)

thanks by the way

03-10-13, 07:44 PM

IthaDan

Don't let the fractions of milimeters fool you, I'd say they're all 47mm, the error is in my measuring more than anything else. I don't think shimano would make them less than 1mm off of each other.